EP2999616A1 - Axle support of a vehicle - Google Patents

Axle support of a vehicle

Info

Publication number
EP2999616A1
EP2999616A1 EP14716849.6A EP14716849A EP2999616A1 EP 2999616 A1 EP2999616 A1 EP 2999616A1 EP 14716849 A EP14716849 A EP 14716849A EP 2999616 A1 EP2999616 A1 EP 2999616A1
Authority
EP
European Patent Office
Prior art keywords
braided
profile
axle
fiber composite
longitudinal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14716849.6A
Other languages
German (de)
French (fr)
Other versions
EP2999616B1 (en
Inventor
David Keller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP2999616A1 publication Critical patent/EP2999616A1/en
Application granted granted Critical
Publication of EP2999616B1 publication Critical patent/EP2999616B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
    • B62D29/041—Understructures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
    • B62D21/03—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members transverse members providing body support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions

Definitions

  • the invention relates to an axle of a vehicle, in particular of a passenger car, with at least one longitudinal carrier, which is formed from a fiber composite plastic.
  • the prior art is merely referenced by way of example to DE 10 2012 01 1 797 A1.
  • Front axle of passenger cars today consist of metallic materials such as aluminum or steel. Integral components of such an axle carrier are usually two longitudinal members and one or more cross members, which connect the two longitudinal members together.
  • the side members are mounted from below to body longitudinal members or so-called. Motor carrier.
  • axle carrier A disadvantage of known longitudinal members in axle beams caused by the metallic material (relatively) high weight. Furthermore, in particular the longitudinal members of an axle beam play a not insignificant role with regard to the crash behavior of the vehicle, whereby today's axle beams with metallic longitudinal members appear to be capable of improvement, to the effect that the energy introduced into the vehicle structure during a collision is further intensified by a deformation of the longitudinal members the axle carrier could be dismantled. Also, in the prior art, there is a conflict of goals between an actually desired crash behavior of the vehicle and its driving dynamics and acoustic behavior. While in fact the axle carrier should have as flexible a structure as possible in the event of a crash, as rigid a axle carrier as possible is advantageous for good driving dynamics and acoustics. Based on this prior art, it is an object of the invention to provide a measure to reduce weight on a vehicle axle, which also gives it a good crash performance in meeting the driving dynamics requirements.
  • axle carrier according to the preamble of claim 1 in that the (at least one) longitudinal carrier (the axle carrier) has a braided profile formed from the fiber composite plastic with one or more braided layers formed by the reinforcing threads of the fiber composite plastic.
  • a longitudinal member is formed at least over substantial sections of a fiber composite plastic.
  • Fiber composite plastics are materials which contain at least one fiber material and one matrix material. The corresponding materials are selected according to the high requirements in terms of rigidity and strength and include in particular CFRP (carbon fiber composite plastics) and GRP (glass fiber composite plastics).
  • An inventively provided longitudinal beam is characterized by the fiber composite plastic structure by a high stability at the same time, compared to conventional metallic materials, reduced weight.
  • a favorable crash behavior is registered by the fiber composite plastic in the component, since the fiber composite structure can absorb more energy than a corresponding metallic material.
  • the longitudinal beam according to the invention is characterized by a high rigidity and strength and yet very high energy absorption capacity, whereby a balanced property profile of the longitudinal beam is achieved with regard to the mechanical properties, driving dynamics, acoustics and crash behavior of the axle beam containing this longitudinal beam. It may - as usual in the above-mentioned hydroforming profiles - the longitudinal member or its braid be at least partially formed as a hollow profile, which further reduces the weight, improves the crash behavior and allows easy connection with other components.
  • Hollow profile preferably contains braiding layers, ie it is formed as a braided profile, such that the reinforcing fibers of the fiber composite plastic are braided to at least one braided layer, possibly also a plurality of braiding layers provided on top of it, and thus form a braided tube, as it were). Due to the shape of the braided profile, a good compromise can be achieved between the high freedom of design of an axle beam according to the invention on one side and very good mechanical properties on the other side.
  • the longitudinal beam Due to the relatively high density of a braid compared to, for example, knitted or crocheted the longitudinal beam can be represented with high strength and rigidity, which also has an advantageous effect on the acoustics and driving dynamics, but also provided by the braided structure a sufficiently high deformability in the event of a crash , It may be favorable to weave a braid profile multiple times, which results in a braiding profile constructed from a plurality of braided layers, since in this way the crash behavior is more effectively decentralized and a high energy absorption over further regions of the longitudinal member becomes possible.
  • the braided profile which can also be referred to as braided hose, can have regions of different wall thicknesses, ie the braided layer or braided layers can be designed differently over the length of the longitudinal member. This can be produced, for example, by turning the braiding direction a number of times and thus weaving a braided core commonly used to produce a braiding tube at several points several times.
  • Another embodiment for a lengthwise different embodiment of the braided layers consists in a Different orientation of the braid layer (s) forming reinforcing threads (eg., Carbon or glass fiber filaments).
  • These braiding threads can have a direction adapted to the profile profile of the longitudinal member and / or the respective local loading direction. This direction or orientation of the braiding threads can be variable along the carrier, which can be represented, for example, by a different braiding speed or feed rate during braiding of the reinforcing threads.
  • a braided core is usually required for the production of a braided profile on which the braiding process of the reinforcing fibers takes place. It is customary to build the braid on a braid core in the production of a braided profile, which removed after completion of the braid, for example, dissolved, is.
  • the braid core can be provided at least in sections within the braiding profile, that is to say remaining.
  • the braid profile contained in the axle carrier contains one or the braiding core in certain areas. With a braid core remaining at least in places in the braiding profile, an improved acoustic damping of the longitudinal member can result and its deformation behavior (in particular in the event of a crash) can be set in a targeted manner.
  • the braid core may be made of any suitable material; Particularly suitable for this are foam materials.
  • a braid core remaining in the braided profile or braided hose can in particular show an acoustically positive effect, which is why the braided core can only remain in the braided profile in certain acoustically critical areas.
  • a manufacturing method for a partial or sectional removal of the braided core come, for example, the blowing with a blasting or dissolving with a solvent into consideration.
  • the braided core itself can accommodate (additional) inserts, for example, made of plastics or metals.
  • inserts are braided in producing the braided profile with and form after curing of the plastic material unit with the side member of the axle carrier.
  • Such inserts can form Verschraubungsfeld or stiffeners in the profile, so for example.
  • the necessary connection points between the axle and the vehicle body for example.
  • bulkheads or bulkheads are formed, which support the profile cross-section of the longitudinal member in areas such as the connection of wheel-guiding links.
  • the braided profile may have textile reinforcements.
  • textile reinforcements are obtained for example by the attachment of additional seams, tufts or weaving of the material.
  • the fiber composite plastic of the at least one longitudinal member according to the invention may comprise at least one damping layer, preferably of a visco-elastic material. The provision of such a damping layer improves the acoustic behavior of the longitudinal member, in particular by the fact that the damping is thus integrated directly into the side member structure. Consequently, it is possible to dispense with further external components serving this function, which simplifies the structural structure of the axle carrier or the associated vehicle axle.
  • the Component internal vibration damping is based on the internal friction in the said damping layer. This is ideally used so that the damping layer is stressed by shear forces between the adjacent Flechtlagen. Consequently, those locations with high shear stress can be determined for the oscillation modes to be damped. The proposed damping measure can then be used locally there.
  • further components consisting of a fiber composite plastic may be provided, such as, in addition to at least one cross member, also a pushing field or any kind of receiving devices for fastening further components.
  • a further weight reduction such components simplify the connection to the axle carrier due to their material and it is thus a contact corrosion prevented.
  • the cross member (s) mentioned can be connected to the side members by means of adhesive bonding via node elements, which are preferably made by injection molding or are formed by an SMC (sheet molding compound). By the connection types shown here, the side members and the cross member can be stably attached to each other.
  • a longitudinal member of an axle carrier according to the invention may also have a branch, ie be braided with a branch.
  • Such a branch is, for example, possible to (as an alternative to the above node element) a connection stub for a cross member or to represent an otherwise cross-connection between the (usually) two longitudinal members of an axle carrier according to the invention.
  • axle carrier according to the invention or its further developments described so far:
  • the mechanical properties of the longitudinal carrier or of the axle carrier are improved.
  • the strength of the longitudinal member or the axle beam is increased.
  • the crash behavior of the longitudinal member or the axle beam is improved by the material-optimized fiber composite construction. Locally acting strain energies are decentralized and dissipated to avoid local deformation or destruction.
  • Driving dynamics and acoustics of the longitudinal member or the axle beam are improved.
  • the weight of the longitudinal carrier or the axle carrier according to the invention is lower for the same or better functional properties than in the conventional construction made of steel or aluminum.
  • FIG. 1 shows a plan view of a part of an axle carrier according to a first embodiment
  • FIG. 2 shows a sectional view of an axle carrier in a connection region according to a second embodiment
  • FIG. 3 is a perspective view of a connection region on an axle carrier according to the invention in accordance with a third embodiment.
  • FIG. 3 is a perspective view of a connection region on an axle carrier according to the invention in accordance with a third embodiment.
  • only the parts and components of interest here are shown, all other elements, such as the axle beam, are omitted for clarity.
  • like reference numerals designate like components.
  • Figure 1 shows an axle 10, the two longitudinal members 1 and the two longitudinal members 1 connecting cross member 2, which is in the form of a transverse bridge with two motor bearings 3, has.
  • the longitudinal members 1 are made of a fiber composite plastic, preferably made of GRP or CFK, at least partially, preferably completely formed as a braided profile and thus have a low weight with very good stability.
  • the longitudinal members 1 each contain three screw 4, by means of which the axle 10, for example, to a vehicle body can be fastened.
  • the longitudinal members 1 handlebar connections 5. Hereby wishbones for the suspension can be attached.
  • the longitudinal members 1 and the cross member 2 are connected to each other via a node element 9, for example via an SMC node element (sheet-molding-compound), and thus integrated with each other. Additional fasteners or fasteners are therefore not necessary.
  • a compound of the longitudinal member 1, the cross member 2 and the node element 9 can be done for example by gluing or screwing. The connection is designed so that no setting behavior of the components occurs.
  • FIG. 2 shows a sectional view of a part of an axle carrier 20 according to a second embodiment.
  • the side member 1 shown only in a cross section consists of a braided hose or braided profile 6, within which a braid core 7 is still included.
  • the braided core 7 Through the braided core 7, the acoustic damping of the axle beam 20 is amplified and the deformation property of the axle beam 20 adapted.
  • This illustration according to Figure 2 shows a possible connection between the longitudinal member 1 and a cross member 2.
  • the shape and design of the cross member 2 is not limited in detail.
  • the cross member 2 may, for example, consist of two metallic workpieces arranged in quasi parallel or mirror images of one another, for example of two shell-shaped metal sheets which, as illustrated, enclose the side member 1 with their end portions.
  • a so-called joining flange 8 is formed and an adhesive connection or screw connection can be provided at this point, whereby it is ensured that no setting behavior of the components impairing the secure connection occurs.
  • Figure 3 shows another embodiment of a connection point of a longitudinal member 1 with a cross member 2 in an axle 30, the other - just like the axle 20 of Figure 2 similar to the axle 10 may be constructed in Figure 1.
  • the longitudinal member 1 is connected to the cross member 2 by a node element 9 similar to FIG. 1, for example by an SMC node element (sheet-molding-compound), and the components are thus integrated with one another , Additional fasteners or fasteners are not necessary.
  • the cross member 2 is formed as a round profile and plugged into a suitable provided on the node element 9 recording this. In principle, however, other shapes for the cross member 2 are conceivable.

Abstract

The invention relates to an axle support (20) of a vehicle, said support comprising at least one longitudinal member (1) which is made of a fibre composite plastic in the form of a braided profile (6) having one or more braided layers made of the reinforcement threads of the fibre composite plastic. At least in parts the braided profile forms a hollow profile and at least in parts can contain a braided core (7).

Description

Achsträger eines Fahrzeugs  Axle carrier of a vehicle
Die Erfindung betrifft einen Achsträger eines Fahrzeugs, insbesondere eines Personenkraftwagens, mit zumindest einem Längsträger, der aus einem Fa- serverbundkunststoff gebildet ist. Zum Stand der Technik wird lediglich beispielhalber auf die DE 10 2012 01 1 797 A1 verwiesen. The invention relates to an axle of a vehicle, in particular of a passenger car, with at least one longitudinal carrier, which is formed from a fiber composite plastic. The prior art is merely referenced by way of example to DE 10 2012 01 1 797 A1.
Achsträger, bspw. Vorderachsträger von Personenkraftwagen bestehen heute aus metallischen Werkstoffen, wie Aluminium oder Stahl. Integrale Bestandteile eines solchen Achsträgers sind üblicherweise zwei Längsträger und ein oder mehrere Querträger, die die beiden Längsträger miteinander verbinden. Die Längsträger sind oftmals als IHU-Profile (= durch Innenhoch- druckumformung hergestellte Profile) ausgebildet. An den Längsträgern und/oder Querträgern sind Aufnahmevorrichtungen, beispielsweise für Lenker, Lenkgetriebe oder Motorlagerungen vorgesehen. Zur Befestigung am Fahrzeug werden die insbesondere die Längsträger von unten an Karosserielängsträger bzw. sog. Motorträger montiert. Achsträger, for example. Front axle of passenger cars today consist of metallic materials such as aluminum or steel. Integral components of such an axle carrier are usually two longitudinal members and one or more cross members, which connect the two longitudinal members together. The side members are often designed as hydroforming profiles (= profiles produced by hydroforming). On the longitudinal beams and / or cross members receiving devices, for example, for handlebars, steering gear or engine mounts are provided. For attachment to the vehicle, in particular the side members are mounted from below to body longitudinal members or so-called. Motor carrier.
Nachteilig an bekannten Längsträgern in Achsträgern ist das durch den metallischen Werkstoff hervorgerufene (relativ) hohe Gewicht. Ferner spielen insbesondere die Längsträger eines Achsträgers im Hinblick auf das Crashverhalten des Fahrzeugs eine nicht vernachlässigbare Rolle, wobei heutige Achsträger mit metallischen Längsträgern verbesserungsfähig erscheinen, dahingehend, dass die bei einem Zusammenstoß in die Fahrzeug- Struktur eingebrachte Energie noch weiter verstärkt durch eine Verformung der Längsträger des Achsträgers abgebaut werden könnte. Auch besteht im Stand der Technik ein Zielkonflikt zwischen einem eigentlich gewünschten Crash-Verhalten des Fahrzeugs und dessen fahrdynamischen und akustischen Verhalten. Während nämlich der Achsträger für den Crashfall eine möglichst nachgiebige Struktur aufweisen sollte, ist für eine gute Fahrdynamik und Akustik ein möglichst steifer Achsträger von Vorteil. Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, eine Maßnahme zur Gewichtsminderung an einem Fahrzeug-Achsträger aufzuzeigen, die diesem bei Erfüllung der fahrdynamischen Anforderungen auch ein gutes Crashverhalten verleiht. A disadvantage of known longitudinal members in axle beams caused by the metallic material (relatively) high weight. Furthermore, in particular the longitudinal members of an axle beam play a not insignificant role with regard to the crash behavior of the vehicle, whereby today's axle beams with metallic longitudinal members appear to be capable of improvement, to the effect that the energy introduced into the vehicle structure during a collision is further intensified by a deformation of the longitudinal members the axle carrier could be dismantled. Also, in the prior art, there is a conflict of goals between an actually desired crash behavior of the vehicle and its driving dynamics and acoustic behavior. While in fact the axle carrier should have as flexible a structure as possible in the event of a crash, as rigid a axle carrier as possible is advantageous for good driving dynamics and acoustics. Based on this prior art, it is an object of the invention to provide a measure to reduce weight on a vehicle axle, which also gives it a good crash performance in meeting the driving dynamics requirements.
Die Lösung dieser Aufgabe besteht für einen Achsträger nach dem Oberbegriff des Anspruchs 1 darin, dass der (zumindest eine) Längsträger (des Achsträgers) ein aus dem Faserverbundkunststoff gebildetes Flechtprofil mit einer oder mehreren durch die Verstärkungsfäden des Faserverbundkunst- Stoffes gebildeten Flechtschichten aufweist. Vorteilhafte Aus- und Weiterbildungen sind Inhalt der Unteransprüche. The solution to this problem consists for an axle carrier according to the preamble of claim 1 in that the (at least one) longitudinal carrier (the axle carrier) has a braided profile formed from the fiber composite plastic with one or more braided layers formed by the reinforcing threads of the fiber composite plastic. Advantageous embodiments and further developments are content of the dependent claims.
Bei einem erfindungsgemäßen Achsträger ist ein Längsträger zumindest über wesentliche Abschnitte aus einem Faserverbundkunststoff gebildet. Fa- serverbundkunststoffe sind Werkstoffe, die mindestens ein Fasermaterial und einen Matrixwerkstoff enthalten. Die entsprechenden Materialien werden den hohen Anforderungen bezüglich Steifigkeit und Festigkeit entsprechend ausgewählt und umfassen insbesondere CFK (Kohlenstofffaserverbundkunst- stoffe) und GFK (Glasfaserverbundkunststoffe). Ein erfindungsgemäß vorgesehener Längsträger zeichnet sich aufgrund der Faserverbundkunststoff- struktur durch eine hohe Stabilität bei gleichzeitig, gegenüber herkömmlichen metallischen Werkstoffen, reduziertem Gewicht aus. Zudem wird durch den Faserverbundkunststoff ein günstiges Crash-Verhalten in das Bauteil eingetragen, da die Faserverbundstruktur mehr Energie als ein entsprechender metallischer Werkstoff aufnehmen kann. Somit ist der erfindungsgemäße Längsträger durch eine hohe Steifigkeit und Festigkeit und dennoch sehr hohe Energieaufnahmekapazität gekennzeichnet, wodurch ein ausgewogenes Eigenschaftsprofil des Längsträgers im Hinblick auf die mechanischen Eigenschaften, die Fahrdynamik, Akustik und das Crash-Verhalten des diesen Längsträger enthaltenden Achsträgers erzielt wird. Es kann - wie bei den o.g. IHU-Profilen üblich - der Längsträger bzw. dessen Flechtprofil zumindest abschnittsweise als ein Hohlprofil ausgebildet sein, was das Gewicht weiter reduziert, das Crash-Verhalten verbessert und eine einfache Verbindung mit anderen Bauteilen ermöglicht. Hohlprofil ent- hält vorzugsweise Flechtlagen, d.h. es ist als Flechtprofil ausgebildet, derart dass die Verstärkungsfasern des Faserverbundkunststoffes zu zumindest einer Flechtschicht, ggf. auch mehreren übereiander vorgesehenen Flechtschichten, geflochten sind 8und somit quasi einen Flechtschlauch bilden). Durch die Form des Flechtprofils kann ein guter Kompromiss zwischen hoher gestalterischer Freiheit eines erfindungsgemäßen Achsträger-Längsträgers auf der einen Seite und sehr guten mechanischen Eigenschaften auf der anderen Seite erzielt werden. Aufgrund der relativ hohen Dichte eines Geflechts im Vergleich zu beispielsweise Gewirken oder Gestricken kann der Längsträger mit hoher Festigkeit und Steifigkeit dargestellt werden, die sich auch vorteilhaft auf die Akustik und Fahrdynamik auswirkt, wobei jedoch durch die Flechtstruktur zudem eine ausreichend hohe Verformbarkeit im Crashfall bereitgestellt wird. Günstig kann ist ein mehrfaches Überflechten eines Flechtprofils sein, womit sich ein aus mehreren Flechtschichten aufgebautes Flechtprofil ergibt, da auf diese Weise das Crashverhalten effektiver dezen- tralisiert und eine hohe Energieaufnahme über weitere Bereiche des Längsträgers möglich wird. In an axle carrier according to the invention, a longitudinal member is formed at least over substantial sections of a fiber composite plastic. Fiber composite plastics are materials which contain at least one fiber material and one matrix material. The corresponding materials are selected according to the high requirements in terms of rigidity and strength and include in particular CFRP (carbon fiber composite plastics) and GRP (glass fiber composite plastics). An inventively provided longitudinal beam is characterized by the fiber composite plastic structure by a high stability at the same time, compared to conventional metallic materials, reduced weight. In addition, a favorable crash behavior is registered by the fiber composite plastic in the component, since the fiber composite structure can absorb more energy than a corresponding metallic material. Thus, the longitudinal beam according to the invention is characterized by a high rigidity and strength and yet very high energy absorption capacity, whereby a balanced property profile of the longitudinal beam is achieved with regard to the mechanical properties, driving dynamics, acoustics and crash behavior of the axle beam containing this longitudinal beam. It may - as usual in the above-mentioned hydroforming profiles - the longitudinal member or its braid be at least partially formed as a hollow profile, which further reduces the weight, improves the crash behavior and allows easy connection with other components. Hollow profile preferably contains braiding layers, ie it is formed as a braided profile, such that the reinforcing fibers of the fiber composite plastic are braided to at least one braided layer, possibly also a plurality of braiding layers provided on top of it, and thus form a braided tube, as it were). Due to the shape of the braided profile, a good compromise can be achieved between the high freedom of design of an axle beam according to the invention on one side and very good mechanical properties on the other side. Due to the relatively high density of a braid compared to, for example, knitted or crocheted the longitudinal beam can be represented with high strength and rigidity, which also has an advantageous effect on the acoustics and driving dynamics, but also provided by the braided structure a sufficiently high deformability in the event of a crash , It may be favorable to weave a braid profile multiple times, which results in a braiding profile constructed from a plurality of braided layers, since in this way the crash behavior is more effectively decentralized and a high energy absorption over further regions of the longitudinal member becomes possible.
Es kann das Flechtprofil, welches auch als Flechtschlauch bezeichnet werden kann, über der Länge (des Längsträgers) betrachtet bereichsweise unterschiedliche Wandstärken aufweisen, d.h. die Flechtschicht oder Flecht- schichten können über der Länge des Längsträgers unterschiedlich ausgeführt sein. Dies kann beispielsweise dadurch erzeugt werden, dass die Flechtrichtung mehrmals gewendet wird und damit ein üblicherweise zur Herstellung eines Flechtschlauchs verwendeter Flechtkern an einigen Stellen mehrfach überflochten wird. Eine andere Ausführungsform für eine über der Länge unterschiedliche Ausführung der Flechtschichten besteht in einer un- terschiedlichen Ausrichtung der die Flechtschicht(en) bildenden Verstärkungsfäden (bspw. Kohlenstoff- oder Glasfaser-Fäden). Diese Flechtfäden können eine dem Profilverlauf des Längsträgers und/oder der jeweiligen örtlichen Belastungsrichtung angepasste Richtung aufweisen. Diese Richtung oder Ausrichtung der Flechtfäden kann entlang des Trägers veränderlich sein, was bspw. durch eine unterschiedliche Flechtgeschwindigkeit bzw. Vorschubgeschwindigkeit beim Flechten der Verstärkungsfäden dargestellt werden kann. Considering the length (of the longitudinal member), the braided profile, which can also be referred to as braided hose, can have regions of different wall thicknesses, ie the braided layer or braided layers can be designed differently over the length of the longitudinal member. This can be produced, for example, by turning the braiding direction a number of times and thus weaving a braided core commonly used to produce a braiding tube at several points several times. Another embodiment for a lengthwise different embodiment of the braided layers consists in a Different orientation of the braid layer (s) forming reinforcing threads (eg., Carbon or glass fiber filaments). These braiding threads can have a direction adapted to the profile profile of the longitudinal member and / or the respective local loading direction. This direction or orientation of the braiding threads can be variable along the carrier, which can be represented, for example, by a different braiding speed or feed rate during braiding of the reinforcing threads.
Wie bereits kurz erwähnt wird üblicherweise zur Herstellung eines Flechtpro- fils ein Flechtkern benötigt, auf welchem der Flechtprozess der Verstärkungsfasern erfolgt. Üblich ist es dabei, bei der Herstellung eines Flechtprofils das Geflecht auf einem Flechtkern zu errichten, der nach Fertigstellung des Geflechts entfernt, beispielsweise aufgelöst, wird. Nach einer Weiterbildung der vorliegenden Erfindung kann der Flechtkern zumindest abschnittsweise in- nerhalb des Flechtprofils verbleibend vorgesehen sein, d.h. das im Achsträger enthaltene Flechtprofil enthält seinerseits bereichsweise einen bzw. den Flechtkern. Mit einem zumindest stellenweise im Flechtprofil verbliebenen Flechtkern kann sich eine verbesserte akustische Dämpfung des Längsträgers ergeben und dessen Verformungsverhalten (insbesondere im Crashfall) gezielt eingestellt werden. Der Flechtkern kann aus einem beliebigen geeigneten Material bestehen; besonders geeignet hierfür sind Schaumwerkstoffe. As already mentioned briefly, a braided core is usually required for the production of a braided profile on which the braiding process of the reinforcing fibers takes place. It is customary to build the braid on a braid core in the production of a braided profile, which removed after completion of the braid, for example, dissolved, is. According to a development of the present invention, the braid core can be provided at least in sections within the braiding profile, that is to say remaining. The braid profile contained in the axle carrier, in turn, contains one or the braiding core in certain areas. With a braid core remaining at least in places in the braiding profile, an improved acoustic damping of the longitudinal member can result and its deformation behavior (in particular in the event of a crash) can be set in a targeted manner. The braid core may be made of any suitable material; Particularly suitable for this are foam materials.
Während sich mit einem Entfernen des Flechtkerns eine weitere Gewichtsersparnis ergibt, kann ein im Flechtprofil oder Flechtschlauch verbliebener Flechtkern insbesondere eine akustisch positive Wirkung zeigen, weshalb der Flechtkern auch nur in gewissen akustisch kritischen Bereichen im Flechtprofil verbleiben kann. Als Fertigungsverfahren für ein teilweises bzw. abschnittsweises Entfernen des Flechtkerns kommen bspw. das Ausblasen mit einem Strahlgut oder das Lösen mit einem Lösungsmittel in Betracht. Weiterhin kann der Flechtkern selbst (zusätzliche) Einlegeteile bspw. aus Kunststoffen oder Metallen bestehend aufnehmen. Diese Einlegeteile (selbstverständlich ist auch nur ein einziges Einlegeteil möglich) werden beim Herstellen des Flechtprofils mit umflochten und bilden nach dem Aushärten des Kunststoffmaterials eine Einheit mit dem Längsträger des Achsträgers. Solche Einlegeteile können Verschraubungspunkte oder Versteifungen im Profil bilden, so bspw. die nötigen Verbindungspunkte zwischen dem Achsträger und dem Fahrzeug-Aufbau, bspw. dem eingangs genannten sog. Motorträger. Auch können durch solche Einlegeteile („Einleger") innerhalb des Flechtprofils oder Längsträgers sog. Schotte bzw. Schottwände ausgebildet werden, die in Bereichen bspw. der Anbindung von radführenden Lenkern den Profilquerschnitt des Längsträgers stützen. While a removal of the braided core results in a further weight saving, a braid core remaining in the braided profile or braided hose can in particular show an acoustically positive effect, which is why the braided core can only remain in the braided profile in certain acoustically critical areas. As a manufacturing method for a partial or sectional removal of the braided core come, for example, the blowing with a blasting or dissolving with a solvent into consideration. Furthermore, the braided core itself can accommodate (additional) inserts, for example, made of plastics or metals. These inserts (Of course, only a single insert is possible) are braided in producing the braided profile with and form after curing of the plastic material unit with the side member of the axle carrier. Such inserts can form Verschraubungspunkte or stiffeners in the profile, so for example. The necessary connection points between the axle and the vehicle body, for example. The so-called. Motor carrier mentioned above. Also, by such inserts ("depositors") within the braiding or longitudinal beam so-called bulkheads or bulkheads are formed, which support the profile cross-section of the longitudinal member in areas such as the connection of wheel-guiding links.
Das Flechtprofil kann textile Verstärkungen aufweisen. Solche textilen Verstärkungen werden beispielsweise durch das Anbringen von Zusatznähten, Tuften oder Verweben des Werkstoffes, erhalten. Hierdurch kann im Crashfall die einwirkende Energie auf den gesamten Längsträger ausgewei- tet werden, wodurch starke lokale Beschädigungen reduzierbar sind. Weiterhin kann der Faserverbundkunststoff des zumindest einen erfindungsgemäßen Längsträgers mindestens eine Dämpfungsschicht, vorzugsweise aus einem visco-elastischen Material, umfassen. Das Vorsehen einer solchen Dämpfungsschicht verbessert das akustische Verhalten des Längsträgers, insbesondere dadurch, dass die Dämpfung somit direkt in die Längsträgerstruktur integriert wird. Folglich kann auf weitere dieser Funktion dienende externe Bauteile verzichtet werden, wodurch die bauliche Struktur des Achsträgers bzw. der zugeordneten Fahrzeugachse vereinfacht wird. The braided profile may have textile reinforcements. Such textile reinforcements are obtained for example by the attachment of additional seams, tufts or weaving of the material. In this way, in the event of a crash, the acting energy can be extended to the entire longitudinal member, whereby strong local damage can be reduced. Furthermore, the fiber composite plastic of the at least one longitudinal member according to the invention may comprise at least one damping layer, preferably of a visco-elastic material. The provision of such a damping layer improves the acoustic behavior of the longitudinal member, in particular by the fact that the damping is thus integrated directly into the side member structure. Consequently, it is possible to dispense with further external components serving this function, which simplifies the structural structure of the axle carrier or the associated vehicle axle.
Die besagte Dämpfungsschicht ist idealerweise zwischen auf- oder überei- nander vorgesehenen Flechtlagen eingebracht, kann aber auch zwischen einer Flechtlage und dem Flechtkern oder auf die Außenseite des Geflechts (von Verstärkungsfäden) aufgebracht sein. Aus Gewichts- und Kostengründen kann es empfehlenswert sein, die Dämpfungsschicht nicht über der gesamten Länge des Flechtprofils (des. Längsträgers) vorzusehen, sondern als lokale Patches (= Flicken) nur in schwingungskritischeren Bereichen. Die bauteilinterne Schwingungs-Dämpfung basiert auf der inneren Reibung in der besagten Dämpfungsschicht. Diese wird idealerweise so genutzt, dass die Dämpfungsschicht durch Scherkräfte zwischen den angrenzenden Flechtlagen beansprucht wird. Folglich können für die zu bedämpfenden Schwin- gungsmoden diejenigen Stellen mit hoher Scherspannung ermittelt werden es kann dann die vorgeschlagene Dämpfungsmaßnahme lokal dort eingesetzt werden. The said damping layer is ideally introduced between braiding layers provided on or above one another, but may also be applied between a braided layer and the braided core or on the outside of the braiding (reinforcing threads). For reasons of weight and cost, it may be advisable not to provide the damping layer over the entire length of the braiding profile (of the longitudinal member), but as local patches (= patches) only in vibration-critical areas. The Component internal vibration damping is based on the internal friction in the said damping layer. This is ideally used so that the damping layer is stressed by shear forces between the adjacent Flechtlagen. Consequently, those locations with high shear stress can be determined for the oscillation modes to be damped. The proposed damping measure can then be used locally there.
An einem erfindungsgemäßen Achsträgers können weitere aus einem Fa- serverbundkunststoff bestehende Bauelemente vorgesehen sein, so neben zumindest einem Querträger auch ein Schubfeld oder irgendwie geartete Aufnahmevorrichtungen zur Befestigung weiterer Bauteile. Neben einer nochmaligen Gewichtsreduktion vereinfachen solche Bauelemente aufgrund ihres Materials das Verbinden mit dem Achsträger und es wird damit einer Kontaktkorrosion vorgebeugt. Was den oder die genannten Querträger be- trifft, so können diese über Knotenelemente, welche vorzugsweise in Spritzgusstechnik ausgeführt sind oder durch ein SMC (sheet molding Compound) gebildet sind, durch Klebeverbindung mit den Längsträgern verbunden sein. Durch die hier dargestellten Verbindungstypen können die Längsträger und die Querträger stabil aneinander befestigt werden. Die Bauteile werden integ- raier Bestandteil des Achsträgers, wodurch die Energieaufnahme im Crashfall dezentralisiert und starken lokalen Beschädigungen vorgebeugt wird. Zudem kann auf zusätzliche Verbindungselemente, wie beispielsweise Nieten, Schrauben und dergleichen, verzichtet werden, was die Herstellung des Achsträgers vereinfacht. In diesem Zusammenhang sei darauf hingewie- sen, dass es aufgrund des Flechtens möglich ist, nahezu beliebige Formen darzustellen. Insbesondere kann ein Längsträger eines erfindungsgemäßen Achsträgers auch eine Verzweigung aufweisen, d.h. mit einer Verzweigung geflochten sein. Eine solche Verzweigung ist bspw. möglich, um (alternativ zum o.g. Knotenelement) einen Anschlussstumpf für einen Querträger oder eine anderweitige Querverbindung zwischen den (üblicherweise) beiden Längsträgern eines erfindungsgemäßen Achsträgers darzustellen. On an axle support according to the invention, further components consisting of a fiber composite plastic may be provided, such as, in addition to at least one cross member, also a pushing field or any kind of receiving devices for fastening further components. In addition to a further weight reduction such components simplify the connection to the axle carrier due to their material and it is thus a contact corrosion prevented. As regards the cross member (s) mentioned, they can be connected to the side members by means of adhesive bonding via node elements, which are preferably made by injection molding or are formed by an SMC (sheet molding compound). By the connection types shown here, the side members and the cross member can be stably attached to each other. The components become an inte- gral part of the axle beam, which decentralizes the energy absorption in the event of a crash and prevents severe local damage. In addition, can be dispensed with additional fasteners, such as rivets, screws and the like, which simplifies the production of the axle beam. In this context, it should be noted that it is possible to represent almost any shape due to the braiding. In particular, a longitudinal member of an axle carrier according to the invention may also have a branch, ie be braided with a branch. Such a branch is, for example, possible to (as an alternative to the above node element) a connection stub for a cross member or to represent an otherwise cross-connection between the (usually) two longitudinal members of an axle carrier according to the invention.
Im weiteren seien nochmals Vorteile aufgelistet, die sich mit einem erfindungsgemäßen Achsträger bzw. dessen soweit beschriebenen Weiterbildun- gen einstellen können: Die mechanischen Eigenschaften des Längsträgers bzw. des Achsträgers, wie insbesondere statische und dynamische Steifigkeit, werden verbessert. Die Festigkeit des Längsträgers bzw. des Achsträgers ist erhöht. Das Crash-Verhalten des Längsträgers bzw. des Achsträgers wird durch die materialoptimierte Faserverbundbauweise verbessert. Lokal einwirkende Verformungsenergien werden dezentralisiert und abgeleitet, so dass eine lokale Deformation oder Zerstörung vermieden wird. Fahrdynamik und Akustik des Längsträgers bzw. des Achsträgers werden verbessert. Das Gewicht des erfindungsgemäßen Längsträgers bzw. des erfindungsgemäßen Achsträgers ist bei gleichen bzw. besseren funktionalen Eigenschaften ge- ringer als bei der herkömmlichen Bauweise aus Stahl oder Aluminium. Eine Integration und Befestigung von weiteren Bauteilen wie Querträgern, Querlenkern und/oder Aufnahmevorkehrungen für weitere Bauteile und/oder ein Schubfeld werden vereinfacht. Kontaktkorrosionen werden reduziert. In addition, further advantages are listed which can be adjusted by means of an axle carrier according to the invention or its further developments described so far: The mechanical properties of the longitudinal carrier or of the axle carrier, in particular static and dynamic rigidity, are improved. The strength of the longitudinal member or the axle beam is increased. The crash behavior of the longitudinal member or the axle beam is improved by the material-optimized fiber composite construction. Locally acting strain energies are decentralized and dissipated to avoid local deformation or destruction. Driving dynamics and acoustics of the longitudinal member or the axle beam are improved. The weight of the longitudinal carrier or the axle carrier according to the invention is lower for the same or better functional properties than in the conventional construction made of steel or aluminum. An integration and attachment of other components such as cross members, control arms and / or Aufnahmeporkehrungen for other components and / or a shear field are simplified. Contact corrosion is reduced.
Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung der beigefügten Figuren. Im wesentlichen in Prinzipdarstellung zeigt Further details, features and advantages of the invention will become apparent from the following description of the accompanying figures. Essentially in schematic representation shows
Figur 1 eine Draufsicht auf einen Teil eines Achsträgers gemäß einer ersten Ausführungsform, 1 shows a plan view of a part of an axle carrier according to a first embodiment,
Figur 2 eine Schnittansicht eines Achsträgers in einem Verbindungsbe- reich gemäß einer zweiten Ausführungsform, und FIG. 2 shows a sectional view of an axle carrier in a connection region according to a second embodiment, and
Figur 3 eine räumliche Darstellung eines Verbindungsbereichs an einem erfindungsgemäßen Achsträgers gemäß einer dritten Ausführungsform. In den Figuren sind nur die hier interessierenden Teile und Komponenten dargestellt, alle übrigen Elemente, beispielsweise des Achsträgers, sind der Übersichtlichkeit halber weggelassen. In sämtlichen Figuren beziffern gleiche Bezugszeichen gleiche Bauteile. FIG. 3 is a perspective view of a connection region on an axle carrier according to the invention in accordance with a third embodiment. In the figures, only the parts and components of interest here are shown, all other elements, such as the axle beam, are omitted for clarity. In all figures, like reference numerals designate like components.
Im Detail zeigt Figur 1 einen Achsträger 10, der zwei Längsträger 1 und einen die beiden Längsträger 1 verbindenden Querträger 2, der in Form einer Querbrücke mit zwei Motorlagern 3 ausgebildet ist, aufweist. Die Längsträger 1 sind aus einem Faserverbundkunststoff, vorzugsweise aus GFK oder CFK, zumindest abschnittsweise, vorzugsweise vollständig als Flechtprofil ausgebildet und verfügen damit über ein geringes Eigengewicht bei sehr guter Stabilität. Die Längsträger 1 enthalten je drei Verschraubungen 4, mit Hilfe derer der Achsträger 10 beispielsweise an einer Fahrzeugkarosserie befestigbar ist. Zudem weisen die Längsträger 1 Lenkeranbindungen 5 auf. Hieran kön- nen Querlenker für die Radaufhängung befestigt werden. In detail, Figure 1 shows an axle 10, the two longitudinal members 1 and the two longitudinal members 1 connecting cross member 2, which is in the form of a transverse bridge with two motor bearings 3, has. The longitudinal members 1 are made of a fiber composite plastic, preferably made of GRP or CFK, at least partially, preferably completely formed as a braided profile and thus have a low weight with very good stability. The longitudinal members 1 each contain three screw 4, by means of which the axle 10, for example, to a vehicle body can be fastened. In addition, the longitudinal members 1 handlebar connections 5. Hereby wishbones for the suspension can be attached.
Die Längsträger 1 und der Querträger 2 sind über ein Knotenelement 9, beispielsweise über ein SMC-Knotenelement (sheet-molding-compound), miteinander verbunden und somit ineinander integriert. Zusätzliche Befesti- gungsmittel oder Verbindungselemente sind daher nicht notwendig. Eine Verbindung des Längsträgers 1 , des Querträgers 2 und des Knotenelements 9 kann beispielsweise durch Verkleben oder Verschrauben erfolgen. Die Verbindung ist dabei so ausgebildet, dass kein Setzverhalten der Bauteile auftritt. The longitudinal members 1 and the cross member 2 are connected to each other via a node element 9, for example via an SMC node element (sheet-molding-compound), and thus integrated with each other. Additional fasteners or fasteners are therefore not necessary. A compound of the longitudinal member 1, the cross member 2 and the node element 9 can be done for example by gluing or screwing. The connection is designed so that no setting behavior of the components occurs.
Figur 2 zeigt eine Schnittansicht eines Teils eines Achsträgers 20 gemäß einer zweiten Ausführungsform. Zu erkennen ist, dass der nur in einem Querschnitt dargestellte Längsträger 1 aus einem Flechtschlauch bzw. Flechtprofil 6 besteht, innerhalb dessen ein Flechtkern 7 noch enthalten ist. Durch den Flechtkern 7 wird die akustische Dämpfung des Achsträgers 20 verstärkt und die Verformungseigenschaft des Achsträgers 20 angepasst. Auch diese Darstellung gemäß Figur 2 zeigt eine mögliche Verbindung zwischen dem Längsträger 1 und einem Querträger 2. Die Form und Ausbildung des Querträgers 2 ist im Einzelnen nicht beschränkt. Um eine besonders gute Stabilität bereitzustellen, kann hier der Querträger 2 bspw. aus zwei quasi parallel oder spiegelbildlich zueinander angeordneten metallischen Werkstücken bestehen, z.B. aus zwei schalenförmigen Blechen, die wie figürlich dargestellt mit ihren Endabschnitten den Längsträger 1 umschließen. Dabei ist wie ersichtlich ein sog. Fügeflansch 8 gebildet und es kann an dieser Stelle eine Klebeverbindung oder Schraubverbindung vorgesehen sein, wobei da- rauf geachtet ist, dass kein die sichere Verbindung beeinträchtigendes Setzverhalten der Bauteile auftritt. FIG. 2 shows a sectional view of a part of an axle carrier 20 according to a second embodiment. It can be seen that the side member 1 shown only in a cross section consists of a braided hose or braided profile 6, within which a braid core 7 is still included. Through the braided core 7, the acoustic damping of the axle beam 20 is amplified and the deformation property of the axle beam 20 adapted. This illustration according to Figure 2 shows a possible connection between the longitudinal member 1 and a cross member 2. The shape and design of the cross member 2 is not limited in detail. In order to provide a particularly good stability, here the cross member 2 may, for example, consist of two metallic workpieces arranged in quasi parallel or mirror images of one another, for example of two shell-shaped metal sheets which, as illustrated, enclose the side member 1 with their end portions. As can be seen, a so-called joining flange 8 is formed and an adhesive connection or screw connection can be provided at this point, whereby it is ensured that no setting behavior of the components impairing the secure connection occurs.
Figur 3 zeigt eine andere Ausgestaltung einer Verbindungsstelle eines Längsträgers 1 mit einem Querträger 2 in einem Achsträger 30, der ansons- ten - ebenso wie der Achsträger 20 aus Fig.2 ähnlich dem Achsträger 10 in Figur 1 aufgebaut sein kann. In Fig.3 im Detail zu sehen ist, dass der Längsträger 1 mit dem Querträger 2 durch ein Knotenelement 9 ähnlich Fig.1 , beispielsweise durch ein SMC-Knotenelement (sheet-molding-compound), miteinander verbunden und die Bauteile somit ineinander integriert sind. Zusätz- liehe Befestigungsmittel oder Verbindungselemente sind nicht notwendig. Durch die vorzugsweise Ausgestaltung des Knotenelements 9 ebenfalls als Faserverbundbauteil kann eine dauerhafte und einfache Verbindung zwischen den Achsträgerteilen bei sehr geringem Eigengewicht des Achsträgers 30 hergestellt werden. Figure 3 shows another embodiment of a connection point of a longitudinal member 1 with a cross member 2 in an axle 30, the other - just like the axle 20 of Figure 2 similar to the axle 10 may be constructed in Figure 1. It can be seen in detail in FIG. 3 that the longitudinal member 1 is connected to the cross member 2 by a node element 9 similar to FIG. 1, for example by an SMC node element (sheet-molding-compound), and the components are thus integrated with one another , Additional fasteners or fasteners are not necessary. Due to the preferred embodiment of the node element 9 also as a fiber composite component, a permanent and simple connection between the axle carrier parts can be produced with a very low weight of the axle carrier 30.
In dieser Ausführungsform ist der Querträger 2 als Rundprofil ausgebildet und in eine geeignet am Knotenelement 9 vorgesehene Aufnahme hierfür eingesteckt. Prinzipiell sind aber auch andere Formen für den Querträger 2 denkbar. Auch hier weist der Längsträger 1 am Knotenelement 9 eine Len- keranbindung 5 auf. Hieran können Querlenker für die Radaufhängung be- festigt werden. In this embodiment, the cross member 2 is formed as a round profile and plugged into a suitable provided on the node element 9 recording this. In principle, however, other shapes for the cross member 2 are conceivable. Here, too, the longitudinal member 1 on the node element 9 on a Lenk keranbindung 5. Hereby wishbones for the suspension can be fastened.

Claims

Patentansprüche claims
1. Achsträger eines Fahrzeugs mit zumindest einem Längsträger, der aus einem Faserverbundkunststoff gebildet ist, 1. Achsträger of a vehicle with at least one longitudinal carrier, which is formed of a fiber composite plastic,
dadurch gekennzeichnet, dass der Längsträger ein aus dem Faserverbundkunststoff gebildetes Flechtprofil mit einer oder mehreren durch die Verstärkungsfäden des Faserverbundkunststoffes gebildeten Flechtschichten aufweist.  characterized in that the longitudinal member has a braid profile formed from the fiber composite plastic with one or more braided layers formed by the reinforcing threads of the fiber composite plastic.
2. Achsträger nach Anspruch 1 , wobei das Flechtprofil zumindest abschnittsweise ein Hohlprofil bildet. 2. axle according to claim 1, wherein the braided profile at least partially forms a hollow profile.
3. Achsträger nach Anspruch 1 oder 2, wobei das Flechtprofil (7) des Längsträgers zumindest abschnittsweise einen Flechtkern (8) enthält. 3. axle according to claim 1 or 2, wherein the braided profile (7) of the longitudinal member at least partially contains a braided core (8).
4. Achsträger nach einem der vorangegangenen Ansprüche, dadurch wobei das Flechtprofil (7) textile Verstärkungen aufweist. 4. axle according to one of the preceding claims, characterized in that the braided profile (7) has textile reinforcements.
5. Achsträger nach einem der vorhergehenden Ansprüche, wobei das Flechtprofil zumindest abschnittsweise eine Dämpfungsschicht, beispielsweise aus einem visco-elastischen Material bestehend, aufweist. 5. axle according to one of the preceding claims, wherein the braided profile at least partially a damping layer, for example, consisting of a visco-elastic material comprises.
6. Achsträger nach einem der vorhergehenden Ansprüche, welcher zumindest ein weiteres aus einem Faserverbundkunststoff gebildetes Bauelement aufweist, wie beispielsweise einen Querträger oder eine6. axle according to one of the preceding claims, which has at least one further formed from a fiber composite plastic component, such as a cross member or a
Aufnahmevorrichtung für die Befestigung eines weiteren Bauteiles oder ein Schubfeld. Receiving device for the attachment of another component or a thrust field.
7. Achsträger nach einem der vorhergehenden Ansprüche mit einem als Spritzgussteil oder in SMC-Technik ausgeführten Knotenelement (9), welches jeweils über eine Klebeverbindung den Längsträger (1 ) dem Querträger (2) verbindet. 7. Axle carrier according to one of the preceding claims with a designed as an injection molded part or in SMC technology node element (9) which connects the longitudinal member (1) of the cross member (2) via an adhesive connection.
8. Achsträger nach einem der vorhergehenden Ansprüche, wobei die Flechtschicht(en) im Längsträger über dessen Länge betrachtet unterschiedlich ausgeführt ist/sind, derart dass das Flechtprofil eine unterschiedliche Wandstärke besitzt oder die Ausrichtung der Verstärkungsfäden unterschiedlich ist oder dass im Längsträger eine Verzweigung ausgebildet ist. 8. Achsträger according to one of the preceding claims, wherein the braid layer (s) in the side rail over its length is designed differently / are such that the braided profile has a different wall thickness or the orientation of the reinforcing threads is different or that a branch is formed in the side rail ,
9. Achsträger nach einem der vorhergehenden Ansprüche mit zumindest einem im Flechtkern (8) vorgesehen und aus einem anderen Material als der Flechtkern bestehenden Einlegeteil. 9. axle according to one of the preceding claims with at least one braid core (8) provided and made of a different material than the braid core insert.
10. Achsträger nach einem der vorhergehenden Ansprüche mit einem in Form von lokalen auf oder in das Flechtprofil aufgebrachten oder eingebrachten Flicken („Patches"), welche als Dämpfungsschicht fungieren. 10. Achsträger according to any one of the preceding claims with an applied in the form of local or in the braided profile or introduced patches ("patches"), which act as a damping layer.
EP14716849.6A 2013-05-22 2014-04-11 Axle support of a vehicle Not-in-force EP2999616B1 (en)

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PCT/EP2014/057443 WO2014187614A1 (en) 2013-05-22 2014-04-11 Axle support of a vehicle

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EP2999616B1 (en) 2017-10-11
WO2014187614A1 (en) 2014-11-27

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